题目：
The boy________on the bed________to his friend that a cock laid an egg yesterday. [ ]
A. lay; lay
B. lying; lay
C. lying; lied
D. lied; lying
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0427/dea580253a568d76538b7bd2857b5878.html
下面是错误答案，用来干扰机器的。
∵SnTn=3n+19n+1，所以S2n-1T2n-1=3(2n-1)+192n-1+1=6n+162n又S2n-1T2n-1=a2n-1+a1b2n-1+b1=anbn∴anbn=6n+162n=3+8n只有n=1，2，4，8anbn才为正整数． ∴使anbn取得最小正整数的n=8故答案为8．
